The very best and safest cleaner for a mirror is warm, clean water used with a soft, lint-free cloth. Wring all water from the cloth before wiping the mirror. Dry the mirror immediately with a dry lint-free cloth.
Don't use any acid, alkali, abrasive or concentrated ammonia based cleaner. These cleaners will attack the mirror surface and edges, and possibly cause defects/ markings.
Don't use commercial mirror cleaners that contain ammonia or vinegar.
Always use a clean, soft, grit free cloth to reduce chances or scratching the mirror surface.
We recommend wiping the surface of the mirror with a dry lint-free cloth after each shower/ bath to prevent a build up of moisture on the mirror glass.